The Collaborative International Dictionary of English v.0.48:

Acupressure \Ac`u*pres"sure\, n. [L. acus needle + premere,
   pressum, to press.] (Surg.)
   A mode of arresting hemorrhage resulting from wounds or
   surgical operations, by passing under the divided vessel a
   needle, the ends of which are left exposed externally on the
   cutaneous surface. --Simpson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

acupressure
    n 1: treatment of symptoms by applying pressure with the fingers
         to specific pressure points on the body [syn:
         acupressure, G-Jo, shiatsu]